Chains and heterogens:
PDB Chain Sequences:
>1b37A (A:) prvivvgagmsgisaakrlseagitdllileatdhiggrmhktnfaginvelganwvegv nggkmnpiwpivnstlklrnfrsdfdylaqnvykedggvydedyvqkrieladsveemge klsatlhasgrddmsilamqrlnehqpngpatpvdmvvdyykfdyefaepprvtslqntv platfsdfgddvyfvadqrgyeavvyylagqylktddksgkivdprlqlnkvvreikysp ggvtvktednsvysadyvmvsaslgvlqsdliqfkpklptwkvraiyqfdmavytkiflk fprkfwpegkgrefflyassrrgyygvwqefekqypdanvllvtvtdeesrrieqqsdeq tkaeimqvlrkmfpgkdvpdatdilvprwwsdrfykgtfsnwpvgvnryeydqlrapvgr vyftgehtsehyngyvhgaylsgidsaeilincaqkkmc
>1b37B (B:) prvivvgagmsgisaakrlseagitdllileatdhiggrmhktnfaginvelganwvegv nggkmnpiwpivnstlklrnfrsdfdylaqnvykedggvydedyvqkrieladsveemge klsatlhasgrddmsilamqrlnehqpngpatpvdmvvdyykfdyefaepprvtslqntv platfsdfgddvyfvadqrgyeavvyylagqylktddksgkivdprlqlnkvvreikysp ggvtvktednsvysadyvmvsaslgvlqsdliqfkpklptwkvraiyqfdmavytkiflk fprkfwpegkgrefflyassrrgyygvwqefekqypdanvllvtvtdeesrrieqqsdeq tkaeimqvlrkmfpgkdvpdatdilvprwwsdrfykgtfsnwpvgvnryeydqlrapvgr vyftgehtsehyngyvhgaylsgidsaeilincaqkkmckyh
>1b37C (C:) prvivvgagmsgisaakrlseagitdllileatdhiggrmhktnfaginvelganwvegv nggkmnpiwpivnstlklrnfrsdfdylaqnvykedggvydedyvqkrieladsveemge klsatlhasgrddmsilamqrlnehqpngpatpvdmvvdyykfdyefaepprvtslqntv platfsdfgddvyfvadqrgyeavvyylagqylktddksgkivdprlqlnkvvreikysp ggvtvktednsvysadyvmvsaslgvlqsdliqfkpklptwkvraiyqfdmavytkiflk fprkfwpegkgrefflyassrrgyygvwqefekqypdanvllvtvtdeesrrieqqsdeq tkaeimqvlrkmfpgkdvpdatdilvprwwsdrfykgtfsnwpvgvnryeydqlrapvgr vyftgehtsehyngyvhgaylsgidsaeilincaqkkmckyh